Method for implementing mutual communication of slave stations of high-speed field bus

Abstract

The invention provides a method for implementing mutual communication of slave stations of a high-speed field bus. The method comprises the following steps of: (1) detecting whether a communication data channel of a slave station in the target direction is busy or not by the slave station; if so, receiving data transmitted on the communication data channel, and processing the data, otherwise, performing the next step; (2) judging whether the slave station transmits data thereof or not, if so, performing the next step, otherwise, entering a waiting state; (3) segmenting the data to be transmitted by the slave station, and transmitting the data to the next slave station; and (4) judging whether the data of the slave station is transmitted or not, if so, entering the waiting state, otherwise, continuously transmitting the data until the data is completely transmitted. The invention also provides a mutual communication system for the slave stations of the high-speed field bus for implementing the method. The invention can support direct mutual communication among the slave stations, and can greatly improve the data switch speed among the slave stations.

Description

Technical field [0001] The invention belongs to the field of fieldbus technology, and in particular relates to a method for implementing mutual communication between high-speed fieldbus slave stations and a high-speed fieldbus slave station mutual communication system for realizing the method. Background technique [0002] High-speed field bus refers to the digital, serial, multi-point communication data bus between the field devices installed in the manufacturing or process area and the automatic devices in the control room. It is an all-digital, two-way, two-way, data bus that connects intelligent field devices and automation systems. The multi-station communication system mainly solves the digital communication between the intelligent instruments, controllers, actuators and other field devices in the industrial field, as well as the information transmission between these field control devices and advanced control systems. According to the processing requirements of industrial ...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, many industrial Ethernets only support the communication technology between the master station and the slave station, that is, only one device (master station) can perform initial transmission, and other slave stations can only respond, and the slave station cannot Actively send its own data, this is because in the prior art, the mutual communication between the slave station and the slave station may cause data loss due to conflicts caused by the data transmission of the protocol, that is, if a certain data channel of the field bus If there are more than two pairs of slave stations to exchange data at the same time, if the data length of the data transmission is too long, the hardware physical transmission delay between the slave stations will cause data blocking, and the blocking time is proportional to the data length

Therefore, this greatly limits the data exchange speed between the slave stations, so that the data transmission speed of the field bus is greatly affected

Images